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mangonel    
n. [中世纪的] 投石机

[中世纪的] 投石机

mangonel
n 1: an engine that provided medieval artillery used during
sieges; a heavy war engine for hurling large stones and
other missiles [synonym: {catapult}, {arbalest}, {arbalist},
{ballista}, {bricole}, {mangonel}, {onager}, {trebuchet},
{trebucket}]


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  • CHAPTER 10 MEANS OF EGRESS - 2018 INTERNATIONAL BUILDING CODE (IBC)
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  • Exit Access Stairs | The Building Code Forum
    The notion that a required egress stair on an upper story of a building does not have to be enclosed and protected as an exit initially seems to be almost a contradiction in terms
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    Building codes generally require unrestricted egress from the floor into the stairwell, with limited exceptions in specialized settings such as healthcare or detention facilities, where delayed egress may be permitted under tightly regulated conditions
  • What are the NFPA Guidelines and Standards for Egress?
    The codes and standards also provide guidelines for the width and configuration of exit corridors, stairs and ramps, which must be wide enough to accommodate the maximum number of occupants and be free of obstructions
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